Professor
Sharma, graduate student Robert Ramsey, and undergraduate
Kalpesh Vaghela examining the Diffraction Pattern from a
Switchable Holographic Grating formed in a polymer-dispersed
liquid crystal cell by use of Helium-Neon laser.

Professor
Sharma and Graduate Student, Ying Li in the Raman Spectroscopy
Laboratory. In Raman Spectroscopy, the sample is irradiated with an
Argon ion laser beam and inelastically scattered light is analyzed
with a high resolution Raman spectroscopy system consisting of a
liquid nitrogen cooled CCD camera.

Professor Sharma and
Graduate students, B. Ha and J. Rhee working in the Positron Beam
Spectroscopy Laboratory. A beam of variable energy positrons is
bombarded on the target under study and the positron-electron
annihilation gamma rays are analyzed with solid-state detectors and
associated electronics. These experiments are conducted to
characterize the depth profiles of atomic-scale defects in
semiconductors.

Ultra High Vacuum
Photoemission Spectrometer that is used to measure the valence band
structures of materials. The sample is maintained under high vacuum
(10 -10 Torr) conditions and bombarded with photons of well
defined energy. The electrons released by the photoelectric effect are
collected and analyzed for their energy distributions that provides
information about the valence band of the material.

Graduate student Ha in the
Chemical Vapor Deposition laboratory. This system is used to deposit
high quality diamond films on different substrates.

Professor Sharma making
Photoemission measurements at The Synchrotron Radiation Facility in
Madison, Wisconsin.